All theу Universe and all that we can sense such as Earth, sky, sun, moon, other planets, stars and the eternal space are called Dharmadhatu in the terminology of Buddhism. Dhatu word means a sphere or a realm and Dharma has two meanings as follows:
- Absolute Truth;
- The unique components of the Universe.
This way Dharmadhatu means the Ream of Absolute Truth or a sphere of all the elements. Zen features Dharmadhatu in several ways.